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(11) | EP 0 321 280 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Sealing assembly |
(57) A sealing assembly (4) is used to seal the gap between the two member (1, 2) that
move relative to each other. It includes first and second rings (5, 6) provided in
a groove (3) formed in one of the members. A portion of the outer peripheral surface
of the first ring (5) is in contact with the other member. None of the surfaces of
the second ring (6) makes contact with the other member. The second ring (6) engages
with the portion of the first ring (5) which is not in contact with the other member.
The second ring (6) has a coefficient of thermal expansion smaller than that of the
first ring (5). When the first ring (5) expands due to the heat generated by the slide
of the first ring (5) against the other member, the expansion of the first ring (5)
is limited by the second ring (6). |